The use of snakehead fish behavior in round nose bullet design

Mohd Azam, Siti Zulaiha (2015) The use of snakehead fish behavior in round nose bullet design. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

In this modern era, the conflicts and violence acts are increasing which give an impact to the manufacturing of bullet due to the demand is high. Thus, the manufacturing industry has to improve the performance and design efficiency of the bullet in order to fulfil the market requirement. One of the issues that the manufacturer has to face is the aerodynamic effects on the bullet. The shape of the bullet will determine the impact and aerodynamic features of the bullet and the effectiveness of bullet can be maximized by improving the shape of the bullet. The concept of nature design of snakehead fish (BID) is then proposed to overcome this effectiveness issue. Round Nose Bullet is chosen as an existing design due to have the similar profile when compared to the snakehead fish. SolidWorks SimulationXpress and ANSYS Fluid Flow (FLUENT) are the software utilized in this research study. The results obtained in Linear Static Analysis depict that the improvement design tends to be mushroom shape due to the greater deformation while the Von Mises Stress is then small. Based on the computation of Newton interpolation polynomial, the prediction of fatigue can be obtained. From the computation, the existing design will experience the failure mode when the initial pressure applied, x ≥ 300.921526×106 while for improvement design is x ≥ 472.250888×106 . Besides that, consistency of bullet design is also measured by employing Coefficient of Variation (CV). Based on the calculation of CV, improvement design has the lowest percentage when compared to existing design. Due to that percentage, this bullet design has increased in the number of the spin of the bullet which makes the bullet more stable during trajectory. Therefore, the snakehead fish profile design applied in improvement design is better than an existing design due to the structural and dynamic analyses that are shown.

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